Road-roller.



no MODEL.

' WITNESSES.-

g M/ By PATENTED MAY 19 1903.

W. M. FAWGETT 630. L. HEISLER.

ROAD ROLLER.

APPLIQATION FILED JAN. 6, 1903. v

3 SHEETS SHEET 1.

No. 728,451- PATENT-ED MAY 19, 1903. M. FAWGETT & G. L. HEISLER.

. ROAD ROLLER.

APPLIOATION FILED JAN. 6, 1903.

N0 MODEL.

No. 722L451. PATBNTEDKMAY 19; 1903.

W. M, FAWOETT & 0. L. HEISLER.'

ROAD ROLLER. APPLICATION FILED JANLIB, 1903.

a slima'rs snnm a. I

no MODEL.

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- UNITED STATES Patented May 19, 1903.

PATE T OFFICE.

WILLIAM AND CHARLES L. HEISLER, OF ERIE, PENNSYLVANIA, ASSIGNORS TO JULIAN SCHOLL AND COMPANY, OF NE\V YORK, N. Y.

ROAD-ROLLER.

srnorrroarronr rmin part of Letters Patent No. 728,451, dated May 19, 1903. Application filed January 6. 1903- Serial No. 138,033. (No model.)

To all whom it may concern:

Be it known that we,W1LLIAM M. FAwoETT and CHARLES L. HEISLER, citizens of the United States, residing at Erie,,in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Road-Rollers, of which the following is a 2o vertically through the forward part of the machine. Fig. 3 is a front View of the machine with the rollers removed. Fig. 4 is a plan view, partly in section, on the line 5 5 of Fig. 2. Fig. 5 is a side view of the swivel-pin by means of which the steering mechanism is connected to the yoke. Fig. 6 is-a sectional view taken transversely through the yoke at the swivel-pin. Fig.7 is a bottom plan view of the forward part of the machine. Fig. 7 is a modification, and Fig. 8 is a view showing in detail the gearing for applying the power of the engine to the steering mechanism. Referring to the drawings, A'indicates the main frame of the machine, the walls of which 55 form the water-tank, and By indicates an upright boiler, which is suitably supported within the main frame. The lower wall 1 of the main frame curves upwardly and forwardly over the steering-roller C, and the side walls 2 and 3 converge toward the end, as shown in Figs. 3 and 4, the forward end of the tank or frame thus forming a gooseneck, which extends above the steering-roller. A hearingblock t is arranged at the forward end of the gooseneck between the lower wall 1 and the upper wall 5, and within this block is j0ur naled a horizontal king-post 6, having a flattened head 7, which projects beyond the end of the gooseneck and extends into a recess 8 in the center of a vertical yoke 9, in the ends of which the roller C is journaled. The yoke is detachably con nected to the horizontal kin gpost by a coupling-pin 10, which extends through a vertical openingin the yoke and the head 7 of the king-post. The horizontal king-posttherefore supports theweight of the forward endof the frame and permits the yoke arid roller to rock transversely with respect to the frame, while the coupling-pin connects the yoke to the king-postand permits the yoke and roller .to turn about'a vertical axis for the purpose of steering. Roller or ball bearings 11 may be arranged between the yoke and-'thehead ofthe king-post. The connection of the yoke to the frame by a horizontally-projecting king-post permits the use of a steering-rollerof large diameter without increasing the height of the machine. On account of the height of the yoke-connecting devices above the ground and the leverage which obstructionsupon the ground would exert upon the yoke the coupling devices would be strained or broken unless they were made very heavy or some provision was made for taking up the thrust upon the roller, and thus relievingthe shock and pressure upon the'coupling devices. In order to take up the horizontal thrust and transmit it directly to the frame instead of through the coupling devices, we connect an auxiliary yoke to the lower end of the main yoke, the auxiliary yoke extending around-the rear face of the roller and having an arcuate slot concentric with the vertical axis of the yoke, and a thrust-pin secured to the lower side of the frame extends into this slot and prevents forward or back- .ward movement of the roller relatively'to the coupling devices and frame. As shown in the drawings, the auxiliary yoke comprises the side bars Band 13, which are secured to the no lower ends of the main yoke below the axle of the roller by bolts 14: and brace-rods 15 and a pair of flat bars 15 and 16, secured to the rear ends of the side bars and extending around the rear of the roller, the bars 15 and 5 16 being separatedfromone another and their adjacent edges being concentric throughout the greater portionof their length -with the vertical axis upon which the roller turns in steering- An arcuate guide-slot 17 is thus formed in the auxiliary yoke between the guide-bars 15 and 16. As shown, the bars 15 and 16 are connected at their ends by tieplates 16, secured to the lower sides of the bars, and the tie-plates and said bars are bolted securely to the side bars 12 and 13. A hearing block or plate 18 is secured to the bottom of the tank at the forward end thereof and centrally located between its sides, and a strap or yoke 19, also attached to the lower wall of the tank, extends beneath said bearing-plate. A thrust pin or stud 20 extends through an opening in the strap 19 and into an opening in the plate 18 and is secured in position by a nut 21, which is threaded to the stud and clamps the strap 19 between the nut and a shoulder 22 upon the stud. The main portion of the stud projects below the strap and carries a roller 23, which fits into the slot 17, the roller being of such diameter that very little side play is allowed between the roller and the edge of the slot. The upper end of the stud 20 extends into an opening in the bearing-plate 18, so that the stud is support ed at two points against the thrustv of the yoke. It will be seen that in every position into which the roller is moved for the purpose of steering the thrust-pin will prevent rearward and forward movement of the roller relatively to the coupling devices and frame, and the coupling devices will not be strained by obstructions encountered by the roller.

Upon the upper wall 5 of the frame or tank and at the forward end thereof is arranged a gear-casing 24, having bearings 25 and 26, within which is journaled a vertical steering shaft or head 27. The upper end of the casing has an enlargement 28, within which is arranged a woringear segment 29, secured to the shaft 27 and engaging a worm 30 upon a Worm-shaft 31, which wormshaft is suitably journaled in the sides of the casing and is provided with hand-wheels 32. An opening 33 is formed in the side of the gearcasiug at its lower end, and a steering-lever 34, secured to the steering-shaft 27, projects laterally through this opening. Upon the outer end of the steering-lever is arranged a sleeve 35, which is free to turn upon the lever, and a link 36 is pivotally secured to said sleeve and projects forward through an eye in a swivelpin 37, which is journa-led in vertical openings in the horizontal portion of the main yoke of the roller and at one side of its ver-. tical axis. Strong compression-springs 38 and 39 are arranged upon the link at opposite sides of the head of the swivel-pin, these springs being compressed against the head of the pin by means of adjusting-nuts 40 and 41, respectively. The form and arrangement of the swivel-pin are illustrated in Figs. 5and 6. In these figures it will be noted that the eye' 42 of the pin is beveled at its upper and lower edges, as indicated by the numeral 43, so that the link may have a vertical rocking motion within the eye. The pin, as shown, is secured to the yoke by means of a washer 44 and cotter-pin 45.

In the operation of the steeringgear the movement of the Worm-segment by the worm swings the steering-lever in the desired direction, and the latter through the link, compression-springs, and swivel-pin transmits the motion to the steering-yoke. On account of the sleeved connection between the link and the lever and also on account of the bevel form of the eye in the swivel-pin and the yielding connection between the link and pin the roller may oscillate about the horizontal king-post without straining any of said parts. The universal connection between the link and the steering-lever and the swiveling of the vertical pin 37 permits the angular relations between the lever, link, and yoke to change without straining any part. The main purpose of the springs between the swivelpost and the link is to afford a yielding connection between the yoke and the steering mechanism, which will prevent the transmission of severe and sudden shocks to the wormgearing. It will be seen that any obstruction tending to turn the roller from its course Will compress one spring or the other, accord ing to the direction in which the machine is moving, and thus the steering mechanism will be protected against damaging shocks. This is desirable, for the reason that where worm -gearing is used to steer the machine the gearingitself cannot yield when an obstruction is encountered.

In addition to the means for operating the steering mechanism by hand power previously described provision is also made for operating said mechanism by motor-power, this power being applied to the worm-shaft 31. In the drawings the steering mechanism is operatively connected with the engine D, which propels the road-roller. Referring to Figs. 1 and 8, 46 in the latter figure represents one end of the engine-shaft, which projects into a casing 47. Secured to the shaft within thecasing is a beveled driving-pinion 48. A shaft 49, which transmits power to the steering mechanism, extends through the easing 47 at right angles to the engine-shaft 46, and upon said shaft 49 are arranged two beveled gears 50 and 51, which turn loosely upon the shaft and mesh with the driving-pinion 48. Obviously the gears 50 and 51 will turn in opposite directions when the engine is in motion. In the opposite side of the casing from the driving-pinion is arranged an idle wheel 52 without teeth, which bears against the rims of the gears 50 and 51 to counteract any side thrust which may be given to the gears 50 and 51 by the driving-pinion. The idler is jourualed upon a fixed stud 53,which is suitably secured to the casing. The gears 50 and 51 are provided with shells or sleeves 54 and 55, which project toward one another, these shells being preferably formed integral with the gears and having their inner faces tapering or conical, as shown. Each shell has a leather lining 56, which forms a friction surface. Upon the shaft 49 and between the gears 50 and 51 is secured a doubletoned drum 57 of such diameter that it will other of the friction-surfaces.

not engage the friction-surfaces of either of the sleeves upon the gears when the drum is inthe central position, (shown in Fig. 8;) but when moved slightly in either direction from the central position it will engage one orthe As the gears 50 and llare constantly rotated in opposite pinion-60'up on the shaft 49. This pinion the shaft between a pair of collars 67 and 68,"

has a long hub 61, through whichthe shaft 49 extends. The shaft is movable longitudinallywithin the'hub, and the pinionis caused to turn with the shaft by means of a spline orkey 62. may thus be moved longitudinally inorder to engage or disengage the drum and frictionsurfaces without disturbing the relation of the gears 59 and 60. This longitudinal m'o ve ment of the shaft -19 is accomplished'by means of a link 63,'suitably connected at one'end to a hand controlling-lever 64 and having at its opposite end a fork 65, which is connected to a trunnion-collar 66, loosely mounted upon whichare secured to the shaft. It 'will be evident that by moving the controlling-lever 64'backward or forward from its mid-position the worm-shaft 31wil l be turnedby'the' power of the engine, resulting in turning the steering-roller about'its vertical axis. .When the steering-rolleris turned to the desired an gle, the controlling-lever is =brought'to the central position, and the worm-gearing will hold the roller at the same angle until power is again applied to theworm-shaft. It will be noticed that whenthe controlling-lever is in its central position the worm-wheel may be turned by hand-power for the purpose of steering, there being no interference between 7 thejm'ain frame,"a steering-lever for turning the motor mechanism and the ances.

Instead of providingtwo curved guide-bars on the auxiliary yoke with 'a' single thrust pin hand appli-' or stud'between said bars we may, as shown in Fig. 7, use only a single guide-bar 16F and arrange studs 20 and 20" at edges of the bar. I

Having described our invention, what we" claim, is-- 1. In a self-propelled road-roller, the combination with a frame and aste'ering-roll'er,

of a main yoke extendingover the roller and movable about a vertical 'axis,'an auxiliary yoke connected to the main yoke and extending around the rear face of the roller, said auxiliary yoke having an arcuateslot concentric with the vertical axis of the main The power-transmitting shaft 49 the opposite and desire to secure by Letters Patent,

yoke and a stud secured to the frame and ex yoke, a stud secured to themainframe and extendinginto said slot,and a roller upon said stud.

3. In a self-propelled road-roller, the combination with a frame havinga gooseneck and a king-post journaled in the gooseneck and projecting horizontally therefrom, of a steering-roller, a main yoke extending over said.

roller and pivotally connected to. the kingpost, an auxiliary yoke connectedtolthe main yoke and extending around the rear face of the roller and having an arcuate slot concen trio with the vertical axis of the main yoke,

and a stud secured to the frame and extending into said slot.

4. In a self-propelled road-roller, the combination with a' frame having a gooseneck and.

a king-post 'journaled in the' goosene'ck and projecting horizontally therefrom','of a steer.-

ing-roller, a main yoke extending over said roller'and pivotally connected to the king- I post, an auxiliary yoke connected to the main yoke and extending around the rearface of f a the roller and having an arcu'ate slot concentric with the vertical 'axis of the main yoke,

'a stud secured tothe frame and, extending.

into said slot and aroller upon said stud.

5. In a self-propelled road-roller, a main frame,a steering r'oller, a yoke extending over the steering-roller and pivotally connected' to the'main frame,'a steering-lever for turning said yoke and roller about a vertical axis, a link connecting said lever with the yoke at one side of the vertical axis,'and a spr'i'ngconnection between said link'a'nd yoke;

IIO

6. In a self-propelled road-roller, a main.

the steering-roller and pivotally connected to frame,'a steering-roller, a yoke extending over, 15

side of the vertical'axis, and a spring connection between said'lin'k and yoke.

7." In a self-propelled road-roller, a main W framea steering-roller, a yoke extending over, L

the steering-roller and pivotally connected to the mainframe, a steering-lever for turning link having a universalconnection withfthe lever and'extendingthroug'h an eyeupo'nthe. 7 yoke, stops upon said link,and's"p'rings .interf "posed between said stops and eye.

8."In a self-propelled road roller, I a main frame, a steering-roller, a yoke extending over the steering-roller and pivotally connected to themain frame, a steering-lever for turning ,iz5 said yoke and roller about avertical axis, a

ise

said yoke and roller about a vertical axis, and a link having a universal connection with the lever and a spring connection with the yoke.

9. In a self-propelled road-roller, a main frame, a steering-roller, a yoke extending over the steering-roller and pivotally connected to the main frame, a steering-lever for turning said yoke and roller about a vertical axis, a swivel-pin journaled in the yoke at one side of the vertical axis, and a link connecting said lever with the swivel-pin.

10. In a self-propelled road-roller, a main frame, a steering-roller, a yoke extending over the steering-roller and pivotally connected to the main frame, a steering-lever for turning said yoke and roller about a vertical axis, a swivel-pin journaled in the yoke at one side of the vertical axis, said swivel-pin having an eye, a link having a universal connection with the lever and extending through the eye of the swivel pin, stops on said link and springs interposed between said stops and the swivel-pin.

11. In a self-propelled road-roller, a main frame, a steering-roller, a yoke extending over the steering-roller and pivotally connected to the main frame, a steering-lever for turning said yoke and roller about a vertical axis, worm gearing for operating said lever, a swivel-pin journaled in the yoke at one side of the vertical axis, said swivel-pin having an eye, a link having a universal connection with the lever and extending through the eye of the swivelpin, stops on said link and springs interposed between said stops and the swivel-pin.

12. In a self-propelled road-roller, the combination with a main frame having a gooseneck, a king-post journaled in the gooseneck and projecting horizontally therefrom a steering-roller, and a yoke extending over said roller in front of the gooseneck and pivoted to the king-post, of a vertical steering-shaft supported upon the frame, worm-gearing for. operating the shaft, a steering-lever secured to said shaft, a swivel-pin journaled in the yoke at one side of its vertical axis, said swivel-pin having an eye, alink extending through said eye and having a universal connection with the steering-lever, stops upon said link and springs interposed between said stops and pin.

13. In a self-propelled road-roller, the combination with a steering-roller, a Worm-shaft .and intermediate mechanism for turning said roller about a vertical axis, of a motor, fricbination with a steering-roller, a worm-shaft and intermediate mechanism for turning said steering-roller about a vertical axis, of a mo tor, conical frictional surfaces rotatable in opposite directions by said motor, a transmitting-shaft geared to worm-shaft, a doubleconed drum upon said transmitting-shaft, and means for moving said shaft and drum longitudinally.

15. In a selfpropelled road-roller, the combination with a steering-roller, a worm-shaft and intermediate mechanism for turning said steering-roller about a vertical axis, of a motor, a beveled pinion upon the motor-shaft, a pair of beveled gears opposed to one another and meshing with said pinion, said gears having sleeves or shells projecting from their adjacent faces and provided with conical friction-surfaces,alongitudinally-movable trans mitting-shaft, a double-coned friction-drum upon said shaft between said gears, gearing connecting said transmitting-shaft with the Worm-shaft, and means for moving said transmitting-shaft longitudinally.

16. In a self-propelled road-roller, the combination with a steering-roller, worm-shaft and intermediate mechanism for turning said steering-roller about a vertical axis, of a motor, a beveled pinion upon the motor-shaft, a pair of beveled gears opposed to one another and meshing with said pinion, said gears having sleeves or shells projecting from their adjacent faces and provided with conical friction surfaces, a transmitting shaft upon which said friction-gears are journaled, a double-coned drum upon said shaft between the friction-gears, a gear upon the wormshaft, a pinion upon the transmitting-shaft meshing with said gear, said transmittingshaft being movable longitudinally through said latter pinion and the friction-gears, and hand-operated means for moving said transmitting-shaft longitudinally.

17. In a self-propelled road-roller, the combination with a main frame having a gooseneck, and a king-post journaled horizontally in the gooseneck, of a steering-roller, a main yoke extending over said roller and pivotally connected to the king-post, an auxiliary yoke connected to the main yoke and extending around the rear face of the roller concentric with the vertical axis of the main yoke and means connected with the frame for taking up the horizontal thrust of saidauxiliary yoke.

18. In a self-propelled road-roller, the combination with a main frame having a gooseneck and a king-post horizontally arranged therein, of a steering-roller, a yoke extending over the roller and connected to said kingpost, said yoke being movable about a vertical axis, an auxiliary yoke extending around the rear face of the roller below the horizontal axis of the roller and concentric with the Vertical axis of the main frame, and means connected with the main frame for taking up the horizontal thrust of said auxiliary yoke.

vice for taking up the horizontal thrust of said 1o auxiliary yoke, said device being secured to 1 the main frame in fixed relation thereto in the rear of the roller and engaging parts upon the yoke at the rear of the roller.

In testimony whereof we afiix our signatures in presence of two witnesses.

n WILLIAM M. FAWCETT, CHARLES L. HEISLER. Witnesses:

E. I. ,ZINN, AUSTIN O. HAYWARD.- 

